class is not found: com.ibm.team.filesystem.cli.minimal.client.FrontEndClient

Hello,

I am trying to run scmtools 3.0.1.3 on AIX PPC. I downloaded the RTC-BuildSystem-Toolkit-AIX-3.0.1.3, and unpacked on the AIX machine.
I edited lscm and scm.sh files to point to the Java found on the AIX machine.

I try to run:
# ./lscm login -r https://<host>:9443/ccm -u jazzadmin
and I'm getting:
The java class is not found:  com.ibm.team.filesystem.cli.minimal.client.FrontEndClient

All I found about this error online is
https://issues.jenkins-ci.org/browse/JENKINS-11967
according to this link this issue is caused by a configuration error, but it doesn't explain what the error is.
Can anyone please assist?